First specimen-blood and serun test: result-negative (12 a.m, one blue colouring).
Second specimen-serum test: result positive, with a low level of antigen
(12 a.m, 3.p.m, two blue colourings).
Third specimen-serum test: result positive, with a high level of antigens (12 a.m, 3 p.m, 9 p.m., three blue colourings).
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